Glass machine and process.



E. L. HEINTZ. GLASS MACHINE AND PROCESS.

APPLIO ATIOH-FILED FEB. 18, 1907.

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' Patentd Dec. 29, 1908.

3 SHEBTS-SHBBT 2.

" WITNESSES BYMKO E. L. HEINTZ. GLASS MACHINE AND PROCESS.

' AIPLIOATI n 908,259. m 18 Patented Dec. 29, 1908. 38HBBTB8HBBT a.

20" WITNESSES a t i a an .T i urmr lliiiiili i it. Fl "Uh/c lia ENGLEBERT LUDVIK HEINTZ, OF GOFFEYVILLE, KANSAS.

GLASS MACHINE AND PROCESS.

Specification of Letters Patent,

. 1 an r rites 2w, 119cc.

Application filed February 18, 1907. Serim No. 357,866.

T 0 all whom it may concern.

Be it known that I, ENGLEBERT LUDVIK HEINTZ, a citizen of the United States, and a resident of Coffeyville, in the county of Montgomery and State of Kansas, have invented a new and Improved Glass Machine and Process, of which the following is a full, clear, and exact description.

This invention relates to the art of glass making, and concerns itself with aprocess and with a machine or apparatus for carrying out said process.

The object of the invention is to produce a process and apparatus by means of which a glass sheet may be drawn from a mass of molten glass in such a Way that the smoothness and uniformity of the sheet of glass will be preserved throughout its entire area.

More specifically, the object of the invention is to provide. an arrangement for preventing the recession uhich tends to take place at the side edges of a sheet of glass when drawn from a bath of molten glass in the manner suggested. This recession of the side edges tends to wrinkle the sheet of glass and destroy its uniformity.

The invention consists in the construction and combination of parts to be more fully described hereinafter and particularly set forth in the claims.

.RGfGIcHCdiS to be had to the accompanying drawings forming a part of this specification, in 'which similar characters of reference indicate corresponding parts in all the figures.

Figure l is a vertical transverse section through a glass furnace, and illustrating the apparatus by means of which my process is carried out; this section is taken on the line 1-1 of Fig. 2 and looking in the direction of the arrows; Fig. 2 is a vertical section taken in a plane at right angles to Fig. 1; this view is taken on the line 2-2 of Fig. 1 and looking to "ard the right, as in cheated by the arrows; Fig. 3 is a horizontal cross section on the line 3 3 of Fig 2; Fig. 4 is a front clc ation of the baiting frame by means of which the sheet of glass is drawn from the, crucible; and Fig. 5 is a plan of a clamp which I use for supporting the upper end of the glass sheet I as it is drawn. I

Referring more particularly-to the parts,

and especially to Figs. 1 and 2, 1 represents the f re pot of a furnace 2, in the upper porl tion of which furnace there is provided a one cible 3 adapted to hold molten glass it. portion of this crucible is formed with a rocker or half round trunnion 5, by of which the crucible may be tipped up into an inclined position such as that indicated by the .dotted lines in F ig. 2. The cover 6 of the furnace extends over the crucible and formed at the rear with downer tending flange or lip 7 which projec the molten glass so as to incr eiiiciency at the rear edge of the c1u which projects beyond the flange 7. i this flange 7 the space may be consit rr to constitute a drawing or working ch in which the sheet of is drawn. dition to this, the rear wall 9 of the turn: provided with a sill 10 which projects Wardly over the rear edge of the crucible, 2"- indicated, and this sill also operates to i in retaining the heat at this point. This Sill 10 is provided on its under side with a rocker or half round trunnion 11 which enables the sill to be tipped upwardly into the inclined position in which it is indicated in dotted lines in F ig. 2. Under the working chamber '8 the bottom of the crucible is provided with openings 12 formed in upwardly pro tting nipples 13, as indicated in 8. side of the furnace I provide a me n gallows 14, which frame comprises in rights or posts 15 disposed opposite to each othe as shown. On these posts jus t al are the 10 stub shafts 16 are rotatably mounted, and another shaft 17 is mounted between tl pcr ends of the standards. These provided with sprocket wheels 18 over endless sprocket chains 19 pass, At suitable points these sprocket cl provided with hooks 20, the purpose 0. will be described more fully hereinafter. forward of the endless chains 1 provide a l ing frame 21. This baiting frame comp a horizontal batten 1 2' which is supported at its ends upon cords At its extremities side bars 24 extend vertically do .3. Referring especially to F i, tl e lower e of these side bars 24 threaded to rat guide rods 25avhich hang vertically do ward from the side bars, as shown. mounted on these guide rods 25 F bait 26, which cons of it her near the ends ofvrhich openings 2 vided through which the guide These openings 2. are sulficicntlv i enable the be It to be drawn up onto the ends of the side bars '24 and into the position such as that indicated indottcd lines in Fig. 4. In order to enable the bait to be drawn up in this way, it is sup )orted by means of cords 28 which are attached to PLllOyS 29, as indicated, the said pulleys being rigidly mounted on an axle 3O rotatably carried in brackets 31 attached to the under side of the batten 22.

'lhe fire pot 1 is formed with inside heating chambers 32 which coinnnrnicatewith the interior of the i e pot and heat the side walls of the crucible, as will be iznderstood from an inspection of l ig. 1. the fire pot a bLrncr 33 is provided, and a similar b1 rncr 34; is applied to the f=..rnace throi gh the rear wall 0 thereof, as indicated in Big. 2. In addition to this, a pair cf draw burners 35 are provided, which extend across the sill 10, so that the flame from them may be directed u on the drawn sheet, in a manner which wi i be described more fully hereinafter.

Between the chains 19 and the lip 7 I provide a shield or screen 36, which suspended in a vertical position and tends to protect the drawn sheet, as Will appear more fully hereinafter. In connection with the apparatus, I employ a clamp 37, the construction of which is clearly i ustrated in l ig. 5. This clam consists of a pair of oppositely dispose parallel bars 38, the ends of which are connected by studs 39 pivotally attached at 40, to one of the bars and passing through the opposite bar. Those studs have threaded extremities to receive wing nuts 41-and 41*, and these wing nuts screw up against springs 42 disposed around the studs and thrusting a ainst the uppermost-of the bars, so that W ien the wing nuts are screwed up, the bars will be clamped together. The wing nut 41 has the form of a handle, and the end of the upper bar at this end of the clamp is formed with an open slot 43 which enables the connection between the bars at this point to be readily thrown out so as to enable the bars to be separated at this end.

The manner in which the process is carried out, and the mode of operation of the apparatus will now be described: The crucible is normally in an inclined position, so that the openings 12 are above the level of the molten glass. In order to enable the crucible to be tilted in this manner, the trunnion 5 is provided, as described above, and in order to enable the sill to be moved back out of the way of the adjacent edge of the crucible in swinging upwardly, the aforesaid trunnion 1]. is, provided on the sill. After the glass has been brought to the proper condition for.

drawing, the crucible and sill are returned to the position in which they are illustrated in Fig. 2. Previous to this, however, the drawing frame 21 is lowered so as to project the lower ends of the side bars 24 into the openings 12. In this way the openings 12 are In the lower portion of l closed to prevent escape. of themolten glass when the crucible. is returned .to its horizontal position. 'i he g ide rods 25 are then passed upwardly il\i't)t; the openings 12 and screwed into the lower ends of the side bars. 'l his op a'lion being completed, the

drawing operation then lrgins. in order to draw the sheet, the baiting frame is then drawn upwarcly so that the bait and guide rods move upwardly in unison. As the bait leaves the sinface of the molten glass, a sheet 44 of glass adheres to the lone! edge thereof, and as the. bait moves ujnvariily, inc glass is drawn from the crucible in 1hrform of av sheet. In this way the guide rods in e drawn upwardly tinough the op nings 1'3 inihc bottom of the crucible, and cointantly present themseb. es ad cent to the edges of the forming sheet. I here to these euidc rods, so that the drawn sheet is formed, as it were, in a frame, the upper bar of which is the bait and the side bars of which are the guide rods. In this way the sheet of glass is maintained of uniform width and thickness, and there is no tendency of the side edges to rcccde toward the central vertical axis of the sheet, which is the primary dillieulty overcome by this vention. As the drawing progresses, the drawn sheet near th surface of the molten and near the guide rods, is maintained at a high temperature by means of the burners 35. These burners insure that the glass will be kept in a sulliciently ductile condition at'its side edges to maintain its adhesion with theguide rods. It is found in practice that indrawing the glass in this manner, it frequently happens that the upper portion ofdfhe sheet of will crack in a horizontal direction so as to form a gap 45 separating the bait from the body ofthe sheet, as illustrated in Fig. 1. In order to hold the sheet 4-4 of glass up in case this occurs, I provide the clamp 37 constructed as illustrated and described above. This clamp is applied in the manner shown in Fig. 1, the bars of the clamp being disposed on opposite sides of the sheet so as to clamp the same. The ends of the clamp project beyond the side edges of the sheet and are adapted to be engaged by the hooks 20 :arried by the chains 19. The chains are then :ulvanced manually or in any other suit able manner, so that the bait 26 is relieved of the weight of the body of the glass therebclow. The screen 36 protects the drawn sheet from the furnaceheat and prevents the sheet from becoming so hot as to interfere with the drawing process.

Having thus described my invention, I clain'i as new and desire to secure by Letters Patent:

1. The process of forming sheet glass,

'i cdgesof the drawn sheet ad-= the extreme edges of said sheet to guide rods, and heating said sheet adjacent to said edges while allowing the body thereof to cool.

2. In glass making apparatus, in combination, a crucible havln openings in the bottom thereof, a' frame aving depending side bars adapted to plug said 0 enings when lowered, rods secured in the ibwer ends of said bars and adapted to be drawn up through said 0 enings when said frame is raised, and a bait betweensaid rods.

3. In glass making apparatus, in combination, a crucible havmg openings in the bottom thereof, a drawing frame having depend: ing bars adapted to plug said openings when- "SB/1d frame is lowered, rods secured in the lower ends of said bars and passing up through said openings, and a bait suspended in said I frameand having its ends guided on said bars.

4. In glass drawing apparatus the combination with a clamp comprisin sheet clamp for moving the clamp when the parts are secured together.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ENGLEBERT LUDVIK HEINTZ.

Witnesses:

JosEPH H. Goon, OSCAR F. HEINTZ. 

